Comment by nearbuy
Kind of a weird take that excludes the vast majority of human artwork that most people would consider novel. For all the complaints one might have of cubism, few would claim it's not novel. And yet it's not based on any new development in the external world but rather on mashing together different perspectives. Someone could have created the style 100 years earlier if they were so inclined, and had Picasso never existed, someone could create the novel style today just by "remixing" ideas from past art in that very particular way.
I would argue that Picasso's life experiences, the environments he grew up and lived in, the people he interacted with, and the world events that took place in his life (like the world wars) were the external developments that led to the development of cubism. Sure, an AI could take in and analyze the works that existed prior, but it couldn't have the emotional reaction that occurred en masse after WWI and started the breakdown of more classical forms of art and the development/rise of more abstract forms of art.
Or, as the kids might say, AI couldn't feel the vibe shift occurring in the world at the time.